Question

A truck is moving with a veel velocity of
90 km 1h and it takes 3 sec to stop after
the brakes are applied calculate the force
excerted by the brakes Mass of truck is 1500
kg ?​

Answer 1

Answer:

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Answer 2

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Here's ur answer

Initial velocity = u = 90km/hr = 90 * 5/18 m/s = 25m/s

Final velocity = v = 0m/s (Truck comes to rest)

Time taken = t = 3s

Mass = m = 1500 kg

Acceleration = a = ?

We know that,

a = (v-u)/t

a = (0-25)/3

a = -25/3  (Negative sign indicates that it is retardation)

We also know that,

Force = Mass * Acceleration

F = ma

F = 1500 * -25/3

F = -12500 N  (-ve sign indicates retarding force)

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